Low Temperature Physics: 36, 693 (2010); https://doi.org/10.1063/1.3490834 (7 pages)
Fizika Nizkikh Temperatur: Volume 36, Number 8-9 (August 2010), p. 875-882    ( to contents , go back )

Quasiparticle theory of superfluid Bose systems with single-particle and pair condensates

A.S. Peletminskii and S.V. Peletminskii

National Science Center "Kharkov Institute of Physics and Technology" 1 Academicheskaya St., Kharkov 61108, Ukraine
E-mail: spelet@kipt.kharkov.ua
pos Анотація:

Received December 14, 2009

Abstract

A semi-phenomenological theory of superfluid Bose systems is considered on the basis of quasiparticle description. This theory enables to describe, from the unified point of view, single-particle and pair condensates both for repulsive and attractive forces. The equations for the order parameters describing these condensates are analyzed in the limit of weak interaction.

PACS: 67.10.–j Quantum fluids: general properties;
PACS: 67.10.Fj Quantum statistical theory;
PACS: 67.25.D– Superfluid phase of 4He;
PACS: 67.85.Jk Other Bose–Einstein condensation phenomena.

Key words: superfluidity, Bose liquid, single-particle Bose condensate, pair condensate, weakly interacting Bose gas.

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